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【解答】解：（1）依据题意可得：<br/>（-3）+（+9）+（-6）+（-10）+（-8）+（+7）+（-5）+（+13）+（+4）=1，
<br/>则蜗牛停在数轴上的原点右侧+1处；
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<br/>（2）依据题意可得：
<br/>（|+9|+|-6|+|-10|+|-8|+|+7|+|-5|+|+13|+|+4|）÷
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</span>=124（秒）．<br/>答：蜗牛一共爬行了124秒．
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